2009AJ....137.4547S

Query : 2009AJ....137.4547S

2009AJ....137.4547S - Astron. J., 137, 4547-4560 (2009/June-0)

The solar neighborhood. XXI. Parallax results from the CTIOPI 0.9 M program: 20 new members of the 25 parsec white dwarf sample.

SUBASAVAGE J.P., JAO W.-C., HENRY T.J., BERGERON P., DUFOUR P., IANNA P.A., COSTA E. and MENDEZ R.A.

Abstract (from CDS):

We present accurate trigonometric parallaxes for 20 new members of the 25 pc white dwarf (WD) sample as part of the Discovery and Evalution of Nearby Stellar Embers (DENSE) project.7 http://www.DenseProject.com Previously, there were a total of 112 WD systems with trigonometric parallaxes placing them within 25 pc and of these, 99 have trigonometric parallaxes known to better than 10%. Thus, the 20 new members presented in this work represent a 20% increase in the number of WDs accurately known to be within 25 pc. In addition, we present updated parallaxes for seven known WDs within 10 pc that have been observed as part of the Astrometric Search for Planets Encircling Nearby Stars initiative to monitor nearby southern red dwarfs and WDs for astrometric perturbations from unseen companions. Including a few WD companions and WDs beyond 25 pc, we present a total of 33 trigonometric parallaxes. We perform atmospheric modeling for WDs to determine physical parameters (i.e., Teff, log g, mass, and WD age). Finally, a new ZZ Ceti pulsating WD was identified and revised constraints are placed on two mixed H/He atmosphere cool WDs that display continuum absorption in the near-infrared.

Abstract Copyright: ∼

Journal keyword(s): astrometry - Galaxy: evolution - solar neighborhood - stars: distances - white dwarfs

Simbad objects: 52

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Number of rows : 52
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 LAWD 96 WD* 00 02 10.7241976499 -43 09 55.390578662   13.12 13.05     DAP5.8 134 0
2 EGGR 246 WD* 00 41 26.0270023159 -22 21 02.292155084   15.25 14.60 14.088 13.671 DQ9 120 0
3 NAME SGP reg 00 51 26.275 -27 07 41.70           ~ 606 0
4 LP 991-16 WD* 01 24 03.9865613559 -42 40 38.426729027     14.83 14.52 14.19 DA7H 38 0
5 V* ZZ Cet WD* 01 36 13.6153974672 -11 20 32.632874601   14.328 14.16 14.4   DA4.0 307 0
6 L 88-59 WD* 01 43 00.9833777734 -67 18 30.353062494   14.33 13.90 13.52 13.23 DA8.1 76 0
7 * omi02 Eri B WD* 04 15 21.7957181469 -07 39 29.203986789 9.147 9.83 9.53     DA2.9 357 0
8 V* RR Cae WD* 04 21 05.5631820426 -48 39 07.061113433 14.50 14.92 14.40     DA7.8 168 1
9 EGGR 482 WD* 04 26 20.6972178793 +04 32 30.625334004   18.21   16.7   DC9 39 0
10 EGGR 41 WD* 04 37 47.4072688697 -08 49 10.619853645   14.24 14.10     DQ8 96 0
11 EGGR 524 WD* 05 14 03.5037732293 +08 00 15.126638361   16.30   15.7   DA7.6 46 0
12 NAME Gal Anticenter reg 05 46 +28.9           ~ 1024 0
13 EGGR 45 WD* 05 55 09.5304871511 -04 10 07.065341021   15.49 14.45 13.994 13.538 DZ11 125 0
14 G 106-51B WD* 06 30 38.5997399928 -02 05 50.485413624     15.32 15.43   DA7.3 40 0
15 G 106-51 PM* 06 30 38.8042685496 -02 05 53.936865204   15.62 14.69   12.41 M3/4: 18 0
16 * alf CMa B WD* 06 45 09.3041925037 -16 43 00.724740067   8.41 8.44     DA1.9 563 1
17 * alf CMi B WD* 07 39 17.8800 +05 13 26.800   10.7 10.92     DQZ 174 0
18 LP 783-2 PM* 07 40 19.3718248157 -17 24 45.912945536   17.6 16.696 14.695 12.37 M6.5Ve 98 0
19 LAWD 25 WD* 07 40 20.7886676070 -17 24 49.156867583   13.36 13.061 12.886 12.70 DZQA6 218 0
20 LAWD 26 WD* 07 53 08.1439021017 -67 47 31.382011435   14.75 14.09     DA9.0 118 0
21 SCR J0753-2524 WD* 07 53 56.6185035783 -25 24 01.480019904   16.18   15.25 15.67 DA10 29 0
22 CD-24 6144 PM* 07 54 10.8827214844 -25 18 11.422307648 12.286 11.107 9.715 8.845 8.029 M0 63 0
23 L 97-3 WD* 08 06 53.7536568947 -66 18 16.701075068   13.76 13.70 13.66 13.61 DQ 107 1
24 SCR J0821-6703 WD* 08 21 26.7015854766 -67 03 20.024531545     15.34 14.82 14.32 DA10.0 29 1
25 CD-32 5613 WD* 08 41 32.4290850497 -32 56 32.915823461   12.07 11.85 12.3   DA5.5 325 0
26 LAWD 30 WD* 09 29 07.9844366140 -71 33 58.992290850   15.615 15.44 14.97 14.83 DA5.9 40 0
27 * alf Leo PM* 10 08 22.31099 +11 58 01.9516 0.88 1.24 1.40 1.37 1.47 B8IVn 891 1
28 WT 1759 WD* 10 12 01.8720031423 -18 43 33.272144578     15.446 15.55 14.92 DZ7 45 1
29 BD-17 3088 PM* 10 12 08.1518125604 -18 37 04.062041386 12.596 11.347 9.910 9.006 8.099 K7V 77 0
30 EGGR 535 WD* 10 38 55.5700182462 -20 40 56.834110426   15.9 16.28 15.54 15.34 DQ10P 98 0
31 LAWD 37 WD* 11 45 42.9169346379 -64 50 29.461957832 11.08 11.725 11.513 11.34 11.163 DQ 287 0
32 LP 852-7 WD* 12 05 26.6739103248 -23 33 12.139045488   13.04 12.90 12.66 12.52 DA5.7 73 0
33 WG 21 WD* 12 26 42.0226230528 -66 12 18.467291952   14.37 13.97     DA6.6 51 0
34 NAME NGP reg 12 51 26.275 +27 07 41.70           ~ 1274 0
35 EGGR 436 WD* 13 08 41.1944602216 +85 02 28.161666517   16.76   15.9   DA9P 61 0
36 LAWD 45 WD* 13 19 25.5578183444 -78 23 28.166272794   17.0 16.16 15.73 15.35 DC 29 0
37 L 40-109 WD* 14 42 51.5151896577 -78 23 53.669029845     16.11 15.82 15.49 DA8.5 19 0
38 LAWD 64 WD* 16 50 44.3428180678 -32 49 23.076977767   16.1 16.21 15.85 15.49 DA8.5 18 0
39 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
40 LSR J1817+1328 WD* 18 17 06.4969710720 +13 28 24.991658238   16.6 15.85 15.4 14.92 DA10 36 0
41 LAWD 80 WD* 20 10 17.5214260072 -21 46 45.798289597   14.60 14.58 14.5   DA5.0 59 0
42 LEHPM 2-5312 WD* 20 12 31.7835496535 -59 56 51.671944462       15.469 14.99 DC9 28 0
43 SCR J2016-7945 WD* 20 16 49.7191840026 -79 45 53.122044219     16.35 15.96 15.57 DA8.5 15 1
44 L 495-82 WD* 20 43 49.2097540365 -39 03 18.019947587   14.29 13.74 13.77 13.68 DA4.5 30 0
45 EGGR 261 WD* 20 49 06.6996392736 +37 28 14.050387020   13.40   13.2   DA3.4 88 0
46 L 570-26 WD* 21 41 57.5651598552 -33 00 29.801367360     14.47 14.30 14.16 DZ7 45 0
47 EGGR 453 WD* 22 53 53.3851734316 -06 46 54.488228178   17.53 15.66 15.70   DZ13 104 1
48 LP 522-46 WD* 23 25 19.8723998499 +14 03 39.604529500   16.3 16.05 15.3 15.10 DA 37 0
49 GD 1212 WD* 23 38 50.7400887024 -07 41 19.970752560   13.44 13.26   13.24 DA4.5 64 0
50 LAWD 94 WD* 23 54 01.0726392457 -33 16 31.078214643   14.6 13.56     DA5.7 63 0
51 L 577-72 PM* 23 54 01.0827378389 -33 16 24.385440650       13.15 10.84 M4V 35 0
52 APMPM J2354-3316C LM* 23 54 09.2806070800 -33 16 26.761079407         16.00 M8.5Ve 25 0

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